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NAD M4, Service Manual, Page: 7 / 34

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NAD M4 Service Manual Download Page 7

Mono                                                           0.20% 
Stereo                                                                                                                    0.25% 

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Sensitivity On                                                               24dBμ
Sensitivity Off                                                                                                                              15 dBμ

RDS Decode Sensitivity       

                                                                                                            25 dBμ

DAB SECTION 

Band lll

                                                                    174MHz-240MHz 

Input    

                                                                  50 Ohm, nominal 

Max signal    

                                                                                                                                    ~ -3dBm 

Sensitivity   

                                                                                                                                      ~ -96dBm 

Adjacent Channel Rejection     

                                                 ~ 35dB 

Display      

                                                              2-line by 16-character 

DOT Matrix 

Audio Output Stereo       

                                                                                                        2.5Vp-p 

48kHz sample rate                                                     16 bit sample Resolution 

Optical S/PDIF     

                                                          IEC60958 Compliant 

48kHz sample rate                                                     24 bit sample resolution 

1-5

Summary of Contents for M4

Page 1: ...SERVICE MANUAL SERVICE MANUAL M4 C AH NAD ELECTRONICSINTERNATIONAL TORONTO M4 C AH FM AM DAB XM TUNER M4 C AH M4 STEREO FM AM DAB XM TUNER STEREO FM AM DAB XM TUNER STEREO NAD 2009 ...

Page 2: ...CONTENTS SECTION 1 SUMMARY SECTION 2 CABINET MAIN CHASSIS SECTION 3 ELECTRICAL SECTION 4 REPLACEMENT PARTS LIST ...

Page 3: ...RY CONTENTS PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO PRODUCTS 1 2 SERVICING PRECAUTIONS 1 3 General Servicing Precautions Insulation Checking Prodedure Electrostatically Sensitive Devices SPECIFICATIONS 1 4 5 1 1 ...

Page 4: ...PONENTS FOR FRAYED LEADS DAMAGED INSULATION INCLUDING A C CORD AND REPLACE IF NECES 5 NO LEAD OR COMPONENT SHOULD TOUCH A RECIVING TUBE OR A RESISTOR RATED AT 1 WATT OR MORE LEAD TENSION AROUND PROTRUNING METAL SURFACES MUST BE AVOIDED 6 ALL CRITICAL COMPONENTS SUCH AS FUSES FLAMEPROOF RESISTORS CAPACITORS ETC MUST BE REPLACED WITH EXACT FACTORY TYPES DO NOT USE REPLACEMENT COMPONENTS OTHER THAN T...

Page 5: ...ncluding Metal panels Input terminals Earphone jacks etc Electrostatically Sensitive ES Devices Some semiconductor solid state devices can be damaged easily by static electricity Such components commonly are called Electrostatically Sensitive ES Devices Examples of typical Es devices are integrated circuits and some field effect transistors and semiconductor chip components The following technique...

Page 6: ...sable Sensitivity 98 MHz 6 dBμ Signal Noise Ratio Mono 72 dB 60 dBμ IHF wtd Stereo 66 dB Frequency Response 20 Hz 15 kHz 60 dBμ 1 0 dB Channel Separation 60 dBμ 30 Hz 33 dB 1 kHz 42 dB 10 kHz 35 dB Alternate Channel Sensitivity 40 dBμ 400 kHz 60 dB Capture Ratio 40 dBμ 1 5 dB AM Suppression 60 dBμ 100 Mod FM 30 Mod AM 65 dB Image Rejection 119 4 MHz 85 dB I F Rejection 10 7 MHz 80 dB Pilot Suppres...

Page 7: ... SECTION Band lll 174MHz 240MHz Input 50 Ohm nominal Max signal 3dBm Sensitivity 96dBm Adjacent Channel Rejection 35dB Display 2 line by 16 character DOT Matrix Audio Output Stereo 2 5Vp p 48kHz sample rate 16 bit sample Resolution Optical S PDIF IEC60958 Compliant 48kHz sample rate 24 bit sample resolution 1 5 ...

Page 8: ...2 1 SECTION 2 CABINET MAIN CHASSIS CONTENTS EXPLODED VIEWS 2 2 1 Cabinet and main frame section 2 2 2 Packing accessory section 2 3 3 Exploded view parts list 2 4 ...

Page 9: ...6 6 6 3 7 5 5 7 7 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 M4 EXPLODED VIEWS 2 2 ...

Page 10: ...AC Cord DAB Antenna Shipping Box Gift Box polyfoam down Polyfoam up Batteries Accessory Box REMOCON AM Antenna M4 Packing Accessory Section 2 3 ...

Page 11: ... M w e r c S e n i h c a M 0 8 0 5 6 4 2 1 6 1 1 0 S 1 r o s r u C g n i R 0 2 0 0 1 5 0 0 7 2 0 0 F F003 76 048010 0 VFD window 1 S012 61 023208 0 Self Taping Screw BTB3X8 C 9 6 H A 1 r e d l o H r o s r u C 1 1 0 0 4 7 0 7 7 4 0 0 F F005 87 048002 0 Input Button Pad 7 S013 61 024106 0 Self Taping Screw STB4 6 2 F006 87 048003 0 Power Button Pad 2 S014 61 023508 0 Machine Screw MB3X8 4 F007 86 04...

Page 12: ...n low active 3 5 3 I2C control SDA and SCL 3 6 4 DAB XM control RXD 3 6 BLOCK DIAGRAMS 3 7 CIRCUIT DIAGRAMS 1 MAIN BOARD DIG SECTION 3 8 2 MAIN BOARD PSU SECTION 3 9 3 FRONT PANEL BOARD 3 10 4 DAB BOARD C VERSION ONLY 3 11 5 XM BOARD AH VERSION ONLY 3 11 PRINTED CIRCUIT DIAGRAMS 1 MAIN BOARD 3 12 2 FRONT PANEL BOARD 3 13 3 DAB BOARD C VERSION ONLY 3 14 4 XM BOARD AH VERSION ONLY 3 15 5 AM FM TUNER...

Page 13: ...in YES 13 5V power supply is correct NO Press the standby button The End ELECTRICAL TROUBLESHOOTING GUIDE 5V is Right NO YES Check the MCU on the FPP board Check Q300 Q303 U302 U303 Check the cable from J300 to J105 Check R621 and R622 Check the main transformer Check D602 Q601 Q603 Q604 Q605 Q606 Q607 Check PSU PCB YES 5 3V power supply is correct NO Check R619 R620 Check D601 Check U603 YES 5V p...

Page 14: ... SELECT signal YES Relay respond properly NO YES Wait for 10 second Press band key to change source FM AM DAB XM mode Level 0 5V 0 1V A Check conection between C425 and main board Check RL101 RL102 R184 R185 Check C425 board YES THD 3 NO YES NO 3 3 Press band key to select AM mode input AM test signal 1K 500mV sinewave at antenna side check output ...

Page 15: ... DAB XM test signal 1K 500mV 0dBFS sinewave at antenna side check output YES NO Press band key to select AM mode input AM test signal 1K 500mV sinewave at antenna side check output 3 4 DAB Level 500mV 50mV THD 0 03 XM Level 2V 0 1V THD 0 03 Level 500mV 50mV THD 5 Check conection between C425 and main board Check RL101 RL102 R184 R185 ...

Page 16: ...DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING 1 SYSTEM 18 432MHz CLOCK 2 M30281 reset in low active ...

Page 17: ...3 I2C control SDA and SCL 4 DAB XM control RXD ...

Page 18: ...B1 MODULE DAB SECTION C VERSION ONLY XM BOARD XM SECTION AH VERSION ONLY UART CONTROL LINE AUDIO DAC PCM1796 OUTPUT FILTER IIS SIGNAL IIS SIGNAL ANALOG OUT R ANALOG OUT L 1 3 2 A 1 3 2 A L R ANALOG OUTPUT L R DIGITAL COAX OUT DIGITAL OPTO OUT 232 TRIG IR INTERFACE M4 BLOCK DIAGRAM ...

Page 19: ...53 10N D103 1N4148 C139 8N2 C140 8N2 6 5 7 U107B OPA2134 C137 22P R162 3K3 R161 3K3 6 5 7 U108B OPA2134 C138 22P R164 3K3 R163 3K3 1 3 2 RL102A HFD3 4 6 5 RL102B HFD3 7 8 RL102C HFD3 1 3 2 RL101A HFD3 4 6 5 RL101B HFD3 7 8 RL101C HFD3 D101 2V4 D102 2V4 DGND C198 100P C116 100P C108 220N C105 47UF 16V C109 220N C107 47UF 16V 8 4 U105C OP275 8 4 U107C OPA2134 8 4 U106C OP275 8 4 U108C OPA2134 R175 2...

Page 20: ... R621 0 33R 1 4W FR AGND Main transformer 120VAC 230VAC 120C BREAKER 13 5VAC 13 5VAC 8VAC S5 STANDBY R600 649R 1 R601 200R 1 C608 10U 50V C609 100uF 16V C607 100N C606 100N C605 3300UF 16V R618 0 33R 1 4W FR R617 0 33R 1 4W FR 1 2 3 4 5 6 7 8 J601 TO 425 POWER AGND C601 220N C602 220N C603 220N C604 220N AGND S3 Q601 2SC2690 Q602 2SA1220 Q603 2SA1015 Q605 2SA1015 Q604 2SC1815 Q606 2SC1815 R610 8K2...

Page 21: ...Q6 13 Q7 12 Q8 11 QS 9 QS 10 VCC 16 GND 8 U303 CD4094 STR 1 D 2 CLK 3 OE 15 Q1 4 Q2 5 Q3 6 Q4 7 Q5 14 Q6 13 Q7 12 Q8 11 QS 9 QS 10 VCC 16 GND 8 U302 CD4094 DGND 5VD 5VD C301 100N C300 100N DGND DGND VD1 VD2 VD3 VD4 VD5 VD6 VD7 VD8 E RS RST LEDA LEDB KEYA1 KEYA2 KEYA3 R306 10K R302 10K KEY_DATA KEY_EN KEY_EN KEY_CLK KEY_CLK DGND 5VD D300 POWER Q302 2SC1815 DGND LED_CON Q303 2SC1815 Q300 2SA1015 Q30...

Page 22: ...0N C511 100N C512 100N C513 100N C509 100N LSDP 1 VSS 2 SC_TX_OUT 3 VDD 4 SC_RX_IN 5 RFU I2C_SCL 6 RFU I2C_SDA 7 VDD 8 ANT_REV 9 VSS 10 RESET 11 SLAVE_SEL 12 I2S_RATE 13 LINKACTIVE 14 COMM_TX_EN 15 VSS 16 VDD 17 COMM_RX_P 18 COMM_RX_M 19 VDD 20 VSS 21 COMM_TX_M 22 COMM_TX_P 23 VSS 24 VSS 25 OSC_OUT 26 VDD 27 OSC_IN 28 SC_RATE 29 TEST 30 VSS 31 HSDP_DATA 32 VDD 33 HSDP_CLK 34 DT4_MODE 35 HSDP_EN 36...

Page 23: ...YPE ET CALIBRE 230V GND GND R115 R180 C119 13 5V 13 5V C625 C156 J104 R164 C108 R215 R135 C125 C199 R142 U110 C139 D102 J103 C140 R162 RL101 C115 R121 R122 R153 C131 U107 R157 C155 D101 C198 R181 R183 C154 Q102 J107 RL102 R149 C129 D104 C128 U105 C111 C112 R144 R143 C127 C143 C124 FMTX FMRX R139 C165 R193 R179 C166 R140 R107 Q110 R109 R191 R192 R214 C170 C126 C151 U114 U104 R103 J109 R141 R110 R17...

Page 24: ...U301 S304 AUTO TUNE S301 MENU FM MUTE GND R308 R329 S300 POWER Q303 J300 R311 D300 R316 Q301GND IR GND KEYB1 KEYB2 KEYB3 R310 R301 KEYB4 KEYB5 GND GND GND C306 GND GND KEY_EN KEY_DATA GND KEY_CLK 5V C305 5V U302 U303 C301 R300 D305 C300 D304 C311 R315 Q302 R309 Q300 2007 C COYPRIGHT NAD ELECTRONICS M4 FPP BOARD VM1 0 PRESET TUNE S310 ENTER S307 S309 S311 PRESET C312 D306 D307 R330 S303 BLEND S305 ...

Page 25: ... GND UN_LOCK RST GND GND GND DAB_RX GND GND MCLK LRCK GND GND DATA BCK 5V3 GND J403 3V3 5V3 C420 C405 U401 C422 R400 U404 R418 R405 R406 R409 R410 R408 R434 R404 C416 R407 R413 R415 R412 R414 R416 C417 C429 R428 R433 U400 R432 R411 R417 C419 C412 R403 C418 C413 C415 C414 L400 C403 R436 R435 C411 C406 R427 R422 RO J401 5V3 5V3 GND TX SPD RX GND LO M4 DAB BOARD VM1 0 2007 C COYPRIGHT NAD ELECTRONICS...

Page 26: ...12 R509 R515 R508 R516 R502 R526 R527 R541 C500 R511 C522 C509 U500 D501 D503 C518 C516 R537 R501 R514 C502 R507 C510 R510 C511 R513 R500 R512 R532 R504 R542 M4 XM BOARD VM1 0 R503 R535 R506 R529 C515 R534 R528 Y500 C503 U501 C517 R536 C501 R533 C519 D502 D504 R543 C523 C507 C508 R531 R530 GND LRCK GND DATA GND GND BCK GND XM_MUTE DT_LNK IIS_RAT DT_REV XMRX XMTX RST 3V3 5V3 5V3 GND J501 C504 R521 ...

Page 27: ...3 16 PRINTED CIRCUIT DIAGRAMS 4 AM FM TUNER BOARD AH C ...

Page 28: ... U 3 J03 01796 01 Digital to analog convertor 1 8 2 P O S S 4 0 1 U B D 6 9 7 1 M C P 3 1 6 1 P O S S T 5 3 1 U W P 5 2 1 3 Q 3 B C 4 7 N S H C T I W S S U B 1 0 5 2 1 3 0 3 0 3 1 6 1 P O S S 5 1 1 U E A C 1 2 2 3 X A M R B D C 1 2 2 3 X A M R E V I E C E R 2 3 2 S R 2 0 1 2 2 3 0 3 0 J Capacitor 3 26 20051 00 Ceramic Chip Capacitor 2 P A C 3 0 6 0 3 7 1 C 2 7 1 C O P N 5 V 0 5 F p 0 2 3 26 10151 ...

Page 29: ... 0 6 Q R G 5 1 8 1 C S 2 r o t s i s n a r T 0 0 5 1 8 1 0 1 3 2 1 D O M 6 2 1 O T 2 0 6 Q U T S Y A 0 2 2 1 A S K r o t s i s n a r T 0 0 0 2 2 1 0 1 3 2 1 D O M 6 2 1 O T 1 0 6 Q U T S Y A 0 9 6 2 C S K r o t s i s n a r T 0 0 0 9 6 2 0 1 3 ICS 2 1 2 9 O T 2 0 6 U 1 3 4 A K 1 3 4 E A 1 3 4 L T r o t a l u g e R C I 0 0 1 3 4 0 0 3 0 2 1 0 2 2 O T 3 0 6 U T 7 1 3 M L r o t a l u g e R 0 0 7 1 3 0...

Page 30: ...0 0 2 0 7 1 r o 2 1 M A C R 4 0 1 J D E R A C R G N O S N A H A C R 3 1 1 0 0 1 0 7 1 2 1 M A C R 3 0 1 J E T I H W A C R G N O S N A H A C R 2 1 1 0 0 1 0 7 1 FUSE 2 2 D L O H E S U F 6 0 6 F 0 0 6 F 1 3 0 0 F H R E D L O H E S U F 1 0 0 0 0 0 2 0 2 A 2 1 C 0 0 6 F V 0 5 2 T A m 0 5 2 E S U F 1 0 1 5 2 2 1 0 2 A 2 1 H A 0 0 6 F V 0 5 2 T A m 0 0 5 E S U F 0 0 1 0 5 2 1 0 2 A 2 1 C 6 0 6 F V 0 5 2...

Page 31: ...M S r o t c u d n I 2 0 0 0 1 4 0 8 0 DIODE 3 2 5 0 8 0 D 2 0 4 D 1 0 4 D 2 5 3 S S 1 E D O I D 1 0 2 5 3 0 4 3 3 3 1 F L E M I N I M 0 0 4 D W 2 1 V 7 4 D M S e d o i D r e n e Z 0 1 9 0 7 4 1 3 3 TRANSISTOR 3 1 3 2 T O S 0 0 4 Q A K E 4 1 1 C T D r o t s i s n a r T 5 0 4 1 1 0 0 1 3 3 03 00125 06 Buffer SN74AHC1G125DCK U402 U403 U404 SSOT23DCK 3 3 03 00244 01 Octal Buffer 74LCX244 SOIC0 3inch T...

Page 32: ... 5 D 3 0 5 D 2 0 5 D 1 0 5 D W 2 1 V 7 4 D M S e d o i D r e n e Z 0 1 9 0 7 4 1 3 3 3 1 F L E M I N I M 0 0 5 D W 2 1 V 3 6 D M S e d o i D r e n e Z 0 1 9 0 3 6 1 3 3 ICS 3 1 0 7 c s 2 0 5 U X 6 P 6 1 Z W 7 C N r e f f u B l a t c O 1 0 6 1 7 0 0 3 0 3 03 00244 01 Octal Buffer 74LCX244 SOIC0 3inch Tube Tape U501 SOIC 20P P1 2 7 12 8X10 3 12 8X7 5 2X 55 1 3 1 0 0 5 U 1 0 E 8 2 6 2 F A 4 B 3 v e R...

Page 33: ...t d r a o B B A D G S H 0 1 O T M P 9 N I D I N I M e r i W 0 0 0 0 4 0 5 4 1 1 A15 10125 00 AC Cord AH Version T582 AH AH 1 1 A15 10250 00 AC Cord C Version X T562 C LF C 1 1 A15 10250 03 RUG 1 9HUVLRQ X CCC BC 1 SWITCHS 1 A11 01101 03 Rocker Switch RF 1003 BB2 TV 5 1 METAL PARTS 1 5 T 3 6 0 6 1 a i c s a F 0 2 0 0 4 7 0 0 7 J 1 1 70 074001 0 Fascia2 Kirksite 5 painting printing 1 1 67 074003 0 S...

Page 34: ... Polyfoam EPE White AH 1 1 89 074001 0 EPE Polyfoam C EPE White C 1 1 89 048003 0 M3 Little Polyfoam A EPE White 28 30g 1 1 89 048004 0 M3 Little Polyfoam B EPE White 28 30g 1 1 87 051001 0 Non woven bag NWC White L580xW310xH53 M71 1 1 m m 0 4 4 0 3 6 g a b y l o P 0 1 0 0 1 0 0 0 9 1 1 88 043003 0 Accessories Box KLWH 1 1 88 043004 0 Box Sheet 1 1 90 001002 0 Manu Polybag 220 370mm 1 1 90 001013 ...

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